JPS647727A - Light transmission equipment - Google Patents

Light transmission equipment

Info

Publication number
JPS647727A
JPS647727A JP62161179A JP16117987A JPS647727A JP S647727 A JPS647727 A JP S647727A JP 62161179 A JP62161179 A JP 62161179A JP 16117987 A JP16117987 A JP 16117987A JP S647727 A JPS647727 A JP S647727A
Authority
JP
Japan
Prior art keywords
light
output
intensity
multiplexed
optical fiber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP62161179A
Other languages
Japanese (ja)
Inventor
Kazuto Tajima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP62161179A priority Critical patent/JPS647727A/en
Priority to US07/212,385 priority patent/US4933929A/en
Priority to EP88110283A priority patent/EP0297504A3/en
Publication of JPS647727A publication Critical patent/JPS647727A/en
Pending legal-status Critical Current

Links

Landscapes

  • Optical Communication System (AREA)

Abstract

PURPOSE:To obtain a large light output and to attain an ultra-long distance large capacity wavelength multiplexing PSK optical fiber communication system by controlling constantly the intensity of a phase or frequency modulated light. CONSTITUTION:To transmitters T1-T10, separate signals S1-S10 are inputted, and the output light is multiplexed in the same propagation direction with a multiplexing device 4. For example, in the transmitter T1, a semiconductor laser 12 is continuously oscillated, the output is given through a light phase modulator 13 to a laser diode saturable light amplifier 14 and the output intensity is constantly corrected. A signal light shaped to a constant intensity regardless of a phase modulation with the amplifier 14 is multiplexed with other channel by the multiplexing device 4 and made incident on an optical fiber 5.
JP62161179A 1987-06-29 1987-06-30 Light transmission equipment Pending JPS647727A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP62161179A JPS647727A (en) 1987-06-30 1987-06-30 Light transmission equipment
US07/212,385 US4933929A (en) 1987-06-29 1988-06-27 Wavelength multiplexed optical transmitter for generating constant-amplitude angle-modulated beams to eliminate phase noise in adjacent transmission channels
EP88110283A EP0297504A3 (en) 1987-06-29 1988-06-28 Wavelength multiplexed optical transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62161179A JPS647727A (en) 1987-06-30 1987-06-30 Light transmission equipment

Publications (1)

Publication Number Publication Date
JPS647727A true JPS647727A (en) 1989-01-11

Family

ID=15730087

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62161179A Pending JPS647727A (en) 1987-06-29 1987-06-30 Light transmission equipment

Country Status (1)

Country Link
JP (1) JPS647727A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0418527A (en) * 1990-05-11 1992-01-22 Nippon Telegr & Teleph Corp <Ntt> Optical soliton transmission method
US6104848A (en) * 1997-03-04 2000-08-15 Nec Corporation WDM optical transmitter
US6134034A (en) * 1996-03-18 2000-10-17 Fujitsu Limited Apparatus and method for controlling power levels of individual signal lights of a wavelength division multiplexed signal light
US6266169B1 (en) 1992-04-08 2001-07-24 Hitachi, Ltd. Optical transmission equipment which transmits an amplified optical data signal and an optical surveillance signal
JP2004516743A (en) * 2000-12-21 2004-06-03 ブッカム・テクノロジー・ピーエルシー Improvements in or related to optical communications

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0418527A (en) * 1990-05-11 1992-01-22 Nippon Telegr & Teleph Corp <Ntt> Optical soliton transmission method
US6266169B1 (en) 1992-04-08 2001-07-24 Hitachi, Ltd. Optical transmission equipment which transmits an amplified optical data signal and an optical surveillance signal
US6728489B2 (en) 1992-04-08 2004-04-27 Hitachi, Ltd. Optical transmission system constructing method and system
US7167652B2 (en) 1992-04-08 2007-01-23 Hitachi, Ltd Optical transmission system constructing method and system
US7292785B2 (en) 1992-04-08 2007-11-06 Hitachi, Ltd. Optical transmission system constructing method and system
US6134034A (en) * 1996-03-18 2000-10-17 Fujitsu Limited Apparatus and method for controlling power levels of individual signal lights of a wavelength division multiplexed signal light
US6271945B1 (en) 1996-03-18 2001-08-07 Fujitsu Limited Apparatus and method for controlling power levels of individual signal lights of a wavelength division multiplexed signal light
US6104848A (en) * 1997-03-04 2000-08-15 Nec Corporation WDM optical transmitter
JP2004516743A (en) * 2000-12-21 2004-06-03 ブッカム・テクノロジー・ピーエルシー Improvements in or related to optical communications
US8200099B2 (en) 2000-12-21 2012-06-12 Oclaro Technology Limited Demodulation of an optical carrier
US8213806B2 (en) 2000-12-21 2012-07-03 Oclaro Technology Limited Optical communications

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